RE: Iridium, Cosmos collide

From: Allen Thomson (
Date: Thu Feb 12 2009 - 01:41:38 UTC

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    Susan Kaltenbach asked,
    > how could the collision have been a surprise?
    Good question indeed. Both satellites were in track by NORAD and, as Igor Lissov noted, an available collision prediction program did predict a very near approach. Presumably the Competent Authorities have even better programs.
    Although pursuing the answer is mostly outside of SeeSat charter, I hope that we see some discussion of the matter elsewhere. 
    Dr. Kelso, in particular, may be able to provide some insights.
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